Building units and construction elements – Prefabricated unit – Closure
Patent
1990-04-09
1994-01-25
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Closure
D25131
Patent
active
D03436900
REFERENCES:
patent: 3462110 (1969-08-01), Cheslock
patent: 4142343 (1979-03-01), Trafton
patent: 4548377 (1985-10-01), Huel
patent: 4844420 (1989-07-01), Oster
1981 Sweets Publication Section 10,15/ALV p. 14 top center of page post model FD12.
Clark Doris
Lavi Industries
Word A. Hugo
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